Open AccessSTRUCTURE OF THE ANAL CANAL AND DISTAL RECTUM IN WISTAR RATS
Author(s) -
Ким,
Andrey Kim,
" Goldberg,
О. А. Гольдберг
Publication year - 2016
Publication title -
bûlletenʹ vostočno-sibirskogo naučnogo centra
Language(s) - English
Resource type - Journals
ISSN - 1811-0649
DOI - 10.12737/22999
Subject(s) - anatomy , anal canal , connective tissue , rectum , muscular layer , adipose tissue , circular muscle , ligament , biology , epithelium , medicine , pathology , smooth muscle , endocrinology
The conducted research relates to the structure of anal canal and distal rectum of Wistar rats. This structure is of interest in terms of comparative anatomy and as an object of experimental model in pathology. We studies female rats aged 6-10 months, weighing 200-300 g. Light microscopy of specimens was performed with the system microscope LEICA DM2000 (Germany). The study findings revealed that the anal canal is lined with multilayered epithelium on the connective tissue, in distal part of which are buried hair follicles, adipose glands and rudiments of perspiratory glands. Passage of anal canal into the skin with high density of hair follicles with adipose glands is a white line. Intrinsic sphinc-ter is identified by thickening of circular layer of the intestine. External sphincter is presented by separate complexes of skeletal muscles fibers, placed exteriorly and inferiorly from the anal canal muscle layer under the hypoderma. We did not detect the Parks’ ligament as a separate structure. This means that the function of this part of the intestine in rats and that one of a human are not completely consistent.